Yarn tensioning device for textile machines



Feb. 5, 1946. F. LAMBACH ETAL v 2,393,995

YARN TEN-SIGNING DEVICE FOR TEXTILE MACHINES pFiled may 27, 1944 E A ifia' la INVENTORS F/P/TZ LAMBACH WALTER S/EGEL BY W? NEY AT-TO 7 ing the yarn,

Patented ch. 5, 1946 YARN TENSIONING DEVICEFOR TEXTILE MACWES Fritz Lambach, Tenafly, and Walter Siegel, Union City, N. 3., assignors to Robert Rainer, Inc.,

Weehawken, N. J.

Application May 27, 1944, Serial No. 537,678

8 Claims.

-Our .invention relates to textile machines, and,

tensioning device, which may be readily adjusted for a proper tensioning of yarns of difierent sizes and/or qualities.

. Another object of our invention is to provide an adjustable yarn tensioning device, which may bemanufactured at low costs.

,A further object of our invention is to provide an adjustable yam ,tensioning device, wherein the parts subject to great wear and tear may be readilyre'placed by new parts, so that it is unnecessary to replace the entire yarn tensioning device if only a part thereof is worn out.

Still another object of our invention is to improve upon yarn tensioning devices for textile machines as now ordinarilymade.

In order to carryout our invention in practice we provide a yarn tensioning device for textile machines, comprising a support, guiding means on said support, a plurality of pins arranged on said support for engagement with a yarn trained around a selected number of pins, at least one of said pins being in slidableengagement with said guiding means for an adjustment of the angle of contact between the yarn and the pins, means for holding the adjustable pin in an adjusted posi-- tion, supporting surfaces surrounding said pins,

and a disc detachably mounted on each of said pins, each of said discs resting on'the supporting surface surrounding the pin for braking engagement with the yarn trained around the pins and placed between the discs and the supporting surace. 1

The above mentioned objects and advantages as 'well as other objects and advantages will be more 1 fully disclosed in the following specification reference being had to the accompanying drawing forming part of this specification, wherein:

Fig. 1 is a top pianview of a. yarn t'ensioning device according to the invention, partly in section,

' said yam tensioning device being equipped-with detachable braking discs on one of its pins encas- Fig. 2 is a front elevational view of the yarn tensioning device shown in Fig. 1, partl in section,

Fig. 3 is a side elevational view of the yarn tensioning device showninl lg. 1. and i tensioning device shown in Fig. 1, wherein, however. detach- FitAisatopplanviewoftheyam I I An object of our invention is to provide a yarn of a second 11.1930 extending upwardly from the support ill. Said eyelet 28 is held in its position scribe hereinafter, only the mounting of able braking discs are arranged on both pins, some I parts being broken away.

support or base of the yarn tensioning device. Said support ill has a recess i2 for engagement with a member of a textile machine, for example for engagement with a post M of a creel carrying bobbins of yarn to be wound on a beam .or' the like. The support may be attached to the member l4 by means of a screw l6 threaded into a threaded bore of the support. g h

A yarn protecting funnel [3 having a center hole is mounted on a shoulder 20 of a lug '22 extending upwardly from the support in. Said funnel is held in its position by the flange of an eyelet 24 inserted into an aperture of said lug 22 and held therein by a split ring 26 being in engagement with a circular groove of the'eyelet and restin against the surface of the lug.

A second eyelet 28 is inserted into the opening by a split ring 32 engaged with a circular groove of the eyelet.

As will be readily understood from above, the

use of split rings for securing the eyelets 24 and 28 to the lugs of the support permits an easy replacement of the eyelets by new ones, if they should be worn out after a period of time. so that it becomes unnecessary to replace the entire yarn tensioning device on the textile machine by a new one, if only an eyelet of the tensioning device is worn out.

The support I0 is provided with two slots generally indicated by 34 and 36. The slot 34 is cOmprised of two portions 38 and 40 merging in each other and being arranged at a right angle to each other. A first pin 42 is slidably and adjustably mounted in the slot 34 forming a guide for said first pin 42, and a second pin 44 is slidably and adjustably mounted in the slot 36 forming a guide for said second pin 44. Preferably, the mounting of the first pin 42 in theslot or guide 34 is exactly the same as the mounting of the second pin 44 in the slot or guide 36, so that it is sufiicient to dethe second pin as best shown in Fig. 2;

hollow pin 44, the bore of the Washer 46 and the slot-36 has its endthreaded, into a square nut Bil being in engagement-with a lip 52 projecting downwardly from the support L The lip 42 serves to prevent the square-nut from rotating when the setting screw 48 is rotated by a screw driver. If it is desired to set the hollow pin 44 in a predetermined position, the screw 48 is loosened.

Referring now to the drawing, ll indicates the whereupon the screw 48 together with the hollow pin 44 and washer 46 may shifted into said predetermined position by sliding same along the guiding slot 36. Thereupon the hollow pin 44 may be firmly held in the adjusted position by tightening the screw 46 by means of a screw driver.

As mentioned above, the hollow pin 42 resting on a'washer 53 maybe adjusted in a, predetermined position along the portions 38 and 46 of the slot 34 in a similar manner as the hollow pin 44 may be adjusted in a predetermined position along "the slot 36. The hollow pin 42 may be held in its adjusted position by means of a setting. screw Preferably, scales are arranged near to the slots 34 and 36 as shown in Fig. 1 so that the operator may readily adjust the pins 42 and 44 in predej termined positions according'to a table indicating certain positions by numbers for certain yams'of a certain size and quality.

Fig. 1 illustrates an example of the application of the yarn tensioning device in practice. lAccording to the showing of said Fig. 1, the yarn 66 1 travelling in the direction of the arrows from a supply (for example a bobbin in the creel, not

shown) to an active element or elements of a textile machine (for example the beam of a warping machine, not-shown) enters the tensioning device through the eyelet 24, is trained around both pins 42 and 44, and leaves the tensioning device 1 through the eyelet 26. The friction caused by the contact of the travelling yarn 56 with the surfaces of the pins 42 and 44 has a braking effect on the 'yam resulting in a tension in the yarn drawn by the element or elements of the textile machines from the supply.

Said braking effect of the tensioning device on a the yarn may be varied in many ways depending on the requirements of the yarn of a certain size and quality to be passed through the tensioning 1 device.

For exampl both pins 42, 44 or either one of said two pin may be equipped with additional braking means. According to Figs. 1-3 such additional braking means are arranged on the pin 44 and will be described hereinafter. A ring 58 of felt or the like surrounding the pin 44 is placed on the surface of the support I6. Said ring 66 carries a disc 66 loosely and detachably mounted on the pin 44. Another disc 62 detachably and rotatably mounted on the pin rests on the first mentioned disc 66. Preferably, said disc 62lsloaded byaplurality of weights 64 detachably and rotatably mounted on th pin 44. If said additional braking means is used, the yarn trained around the pin 44 is placed between the discs'66 and 62. The rin 58 of felt prevents the disc 66 from rotation by the travelling yarn or reduces the rotation of the disc 66 to a minimum, while the disc 62 may freely rotate. As will be readily understood the discs 66 and 62 have an additional braking effect on the yarn. If a still'greater brakingeifect is desired one disc or both discs may be mounted on the pin '44 in such a way, that they are positively prevented from rotation, for example by the arrangement of a key.

discs 66, 62 and weights 64, so that a detailed description is unnecessary. According to Fig. 4, the yarn 56 trained around the pins 44 and 42 is placed between the discs 66, 62 and-between the discs As will be apparent from above, it is optional to the operator to arrange the detachable addi-' tional braking means of the type describedabove and 44 with or without the detachable additional braking means on one pin or both pins. For example, the first pin 42 may be brought from the position shown in full lines in Fig. 1 into the position 42' shown in dash and dot lines, and the second pin 44 may be brought from the position shown in full lines into the position 44 shown in dash and dot lines. This adjustment of the pins causes a change in the angles of contact between the yarn and the pins, which in turn results in a change of the friction, causing a different braking efiect. Of course, if desired, only one of the two pins may be adjusted in a diiferent position for a change in the angle of contact between the yarn and the pins, or the pinor pins may be adjusted in intermediate positions, or the pi 42 may be displaced in theportion 46 of the slot 34 instead of the portion 36 thereof.

Moreover, if desired, only one of the two pins 42, 44 may be used for engagement with the yarn,

whereby a further change in the braking efiect is obtained. For example, only the pin 42 may be used with or without the above described additional braking means; in such a, case the yarn 56 entering the tensioning device through the eyelet 24 contacts the pin 42 first on its right hand side (as viewed in Fig. 1) and travels around the pin towards the eyelet 26, Furthermore, if only the pin 42 is used for tensioning the yarn, the pin 42 may be adjusted in different positions along the portion 36 or 46 of the slot 34 for a change in the angle of contact between the yarn and the pin.

As will be apparent, from above, the tensioning device may be used in many different combinations and adjustments of its elements. The additional braking elements, i. e., the pair of discs 66, 62, may be omitted, or maybe arranged only on the pin 42, or may be arranged only on the pin 46, or may be arranged on both pins 42 and 44. Furthermore, the pins 42, 44 with or without additional braking means may be adjusted in many different positions relative to each other. We have described a preferred embodiment of our invention, but it is clear that numerous changes and omissions may be made without departing from the spirit of our invention. .For example, the guiding slots34, 36 may be of different shape, or any other type of guides may be used for the slidable and adjustable arrangement vof the pins or posts 42, 44. Furthermore,- the three, or more are adjustable. Furthermore it is asoaccs mentioned, that the use of the tensioning device is not limited to the use in creels, that however the tensioning device may be used in combination with any textile machine wherein yarn should I be tensioned.

What we claim is:

1. A yarn tensioning device for textile machines, comprising a support, guiding means on said support, a plurality of pins arranged on said support for engagement with a yarn trained around a selected number of pins, at least one of said pins being in slidable engagement with said guiding means for an adJustment of the angle of contact between thev yarn and the pins, means for holding theadjustable pin in an adjusted position, supporting surfaces surrounding said pins,

and a disc detachably mounted on each of said pins, each of said discs resting on the supporting surfacesurrounding the pin for braking engagement withfthe yarn trained around the pins and placed between the discs. and the supporting surface. 7 v

2. A yarn tensioning device for textile machines, comprising a support. a plurality of pins or contact between the yarn and'the pins, means I tor holding theadiustable pin in position, and a pair of discsdetachably mounted oneach or said pins for braking engagement with the yarn trained around the pins and placed between the discs of said pairs of discs. 5. Ina yarn tensioning device as claimed in claim 1, said discs being rotatably mounted on 1.

said pins.

6. A yarn tensioning device for textile machines, comprising a support, a mat guide on said support, a second guide on said support, a first pin and asecond pin arranged on said support for engagement with a yarn trained. around at least one of said pins, said first pin being. 'slidably'and adiustably engaged with said first, guide, said second pin being slidably and adjustably engaged with said second guide, and.

means forholding the pins in adjusted positions, said support having an opening for the passage oi. the yarn travelling toward said first pin, and

said first guide being shaped for adjusting said first pin in .a direction substantially parallel to p the longitudinal axis of said opening and in a direction at an angle to said longitudinal axis I 'or saidopening;

detachably mounted on each of said pins, each of said discs resting on the supporting surface surrounding the pins ifor braking engagement with the yarn trained around the pin and placed between the disc and the supporting surface. 7

- 3. In a yam tensioning device as claimed in claim 2, said, discs being rotatably mounted on said pins.

4. A yam tensioning device for textile machines, comprising a support, guiding means on said support, aplurality of pins arranged on said support for engagement with a yarn trained around a selected number of pins, at least one .v

arranged at-an angle to each other. the longi tudinal axis of one of said two portions oi the "slot being substantially parallel to the longitudinal axis of said opening, and said first pin I being slidably and adiustably mounted in said slot.

' 8. In a yarn tensioningdevice as claimed in claim 6, a pair of discs detachably mounted on each of said pins for braking enga ent with-the yarn trained around the pins and placed between the discs of said pairs of discs.

mrrz LAMBACH. wan-rm smom a said pins being in slidable engagement ivitn said guiding means tor an adjustment or the angle tensioning device as claimed in claim 6, said first guide comprising alslot having two portions merging in each other and being 

